Q:

What is the opposite of dilated pupils?

A:

Quick Answer

The opposite of dilated pupils are constricted pupils. Constricted, or small pupils, can occur for a variety of reasons including eye injuries, brain trauma, medication side effects and stroke.

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Cocaine and methamphetamine abuse can also cause shrinkage of the pupils. Constricted pupils should be examined by a doctor, especially if they're accompanied by symptoms such as dizziness, light sensitivity and blurred vision. If only one pupil is constricted, it may be the result of a rare disorder known as Adie's pupil. Uneven pupils with drooping eyelids may be indications of serious conditions such as Horner's syndrome and third cranial nerve paralysis.

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    What are the causes of pinpoint pupils?

    A:

    Pinpoint pupils, or abnormal miosis, occur as the result of stimulation to the parasympathetic side of the autonomous nervous system. According to WebMD, drug use, exposure to organophosphates and intracranial hemorrhaging all cause both pupils to shrink. Inflammation and Horner's syndrome usually cause only one pupil to shrink, but not both.

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    Why might pupils be small?

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    Pupils may become small due to different causes, such as drug abuse, side effects of some medications and underlying medical issues, according to WebMD. Constricted or pinpoint pupils can be a symptom of taking or abusing opiates like morphine or heroin. Pupils become constricted because these opioid drugs stimulate a portion of the autonomic nervous system, states the EMT Spot.

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    What is the standard treatment for retinal edema?

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    What are the main causes of cataracts in humans?

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